Adding a custom field to Magento 2 checkout (delivery date, VAT number, gift message) is well-documented for Luma — and a moving target on Hyvä. Here is the complete path for both stacks, with quote extension attribute wiring and admin order display.
Most checkout speed guides repeat the same 20 tips. After tuning 30+ Magento 2 checkouts, only three changes consistently move LCP under 2 seconds: defer non-checkout JS, prefetch the payment iframe, and remove the quote mass-action observer. Here is the exact code and Lighthouse before/after.
Kishan Savaliya9 min read
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